Superheater.



J. GOATES.v

SUPERHBATBR.

APLIATIQN 'ILHD MAY 3,1913. 1,070,l l5. Patented Aug. 12, 1913.

5 SHEETSBHIIET l.

J. COATES.

SUPERHEATBR.

APPLIUATION FILED MAY s, 191'3.

1,070,1 1 5. Patented Aug. 12, 1913.

5 SHEETS SHEET 2.

Fi. l?

,1 vor J. OOATES.

i SUPEBHBATER.

APPLICATION FILED MAY 3, 1913.

Patented Aug. 12, 1913.

SHEETBHHEET 3.

` con; Caca/5595 wmf-.5558,

J. COATES.

SUPERHEATBR.

APPLIOATION FILED MAY 3.1913.

1,0%,1 l 5. Patented Aug. 12, 1913.

5 SHEETS SHEET 4,

J. COA

SUPBRHEA APPLIUATION r1 191s. 1,070,1 l 5. 'Patented Aug. 12,1913.

'5 SHEETS-SHEET 5.

INVENToR. J5/Q7@ (7% Q45 D STES ATENT 0F] JOHN COATES, OF WORCESTERENGLAND.

SUPERHEATER.

Specification of Letters Patent.

Patented Ang. 12,1913.

Application filed May 3, 1913. Serial No. 765,344.

To all whom t may concern:

Be it known that T, JOHN Corri-1s, a British sub'eet residing atlVorcester count ot'- 7 :a 3

lVorcester, lilngland,.have invented certain new and uset'ulImprovements in Superheaters, of which the following is a specification.

This invention relates to improvements in snperheaters, moreparticularly for use with locomotive and marine boilers or with otherboilers of a similar type. i

The invent-ion consists essentially in introducing a sui'ierheater tubeinto some or all of the fire tubes each super-heater tube being Closedat one end and having east. iron rings shrunkl thereon, and eontaining aseeond tube concentric therewith. The east iron rings are preferablyprovided with gills or ribs arranged either spirally or longitudi nallyto direct the tiow of the gases.

The invention will be fully described with reference to the accompanyingdrawings forming part otl the specification.

Figures l and la together constitute a longitudinal vertical sectionthrough a locomotive boiler showing the invention applied thereto. Fig.2. is an end view ot' the same.

Fig. 3. is an outside elevation of one of the super-heater tubes. Fig.a. is au enlarged section of a superheater tube. Fig. is a section online .fc-af Fig. t. Fig. A6. is an enlarged section showing theeonneetion ot' the superheater tube to the header.

A superheater tube is inserted in some or all of the tire tubes B whichmay be enlarged to receive them. The superheater tube is composed of twoconcentric tubes A, A', the inner tube A being maintained in position bythe supports a, (Fig. (3). The outer tube A is closed at one end andopens at the other end into the chamber C ot' the header C Connectedwith the saturated steam space D at the top of the boiler. 'lhe innertube A is open at both ends, the inner end open.

A separate header is preferably provided for each vertical row ofsuperheater tubes .t connected to aeommon'rehamber or pipe c leading tothe steam space Dvabove the boiler and to a pipe .E leading to thecylinder.

Each vertical header (l may also be provided with an additional chamberF containing live steam. Holes f. (Fig. (3), are bored in the wall f ofthe Chamber Fv around the part where the tube A is fixed so that steamjets will blow through the holes f into the re tubes B around thesuperheater tube A in order to keep the latter' clean and free fromsoot.

lings Il of cast iron, steel or other material are shrunk onto the outersurface of the tulies toY protect them. These rings ll are arranged sideby side so that a Complete covering of the tube A is obtained. The ringsll actas equalizers tor the he: t, since if there be an excess ot heatin the gas (lowing through the tire tubes, itwill be absorbed by theserings and will be given out to the steam in the super-heater tubes whenthe heat in thc lire tubes is somewhat diminished. ln this way the ringsll aet as cqualizers, so that a fairly constant supply oll heat is givento the superheater. The, east iron rings ll are. preferably providedwith ribs or gills /L arranged either longitudinally or spil-ally aslshown in Figs. 3. Lt and 5 in which case cach ring is no tittcd thatthe gills thereotl aline with the gills ot' the preceding ring tormiig aseries of spiralI passages around the tube A.

lhe tube is supported in the tube lby the supports l), (Fig. ln), or thegills z may be ot' such av depth that their outer edges engage on theinside ot' the lire tubes .B and `niaintain the superh'eater tubecentrally in the tire tube. y

'lhe closed ends ot the tubes A may be only covered with' plain ringswithout gills. 'lhe ends of the tubes A'are covered with a cast' iron eap or end picco l1. with or with@ out ribs or gills as desired. i,

What l claim as my invention and desire to protect by Letters latentisa-vlu a tire tube boiler the combination with "lha mcetfallc rings aoform continuous pasn lle lulu@ of a supmheator lube placed l my hand inpresence of two subscribing wttherein, metalllc lmgfs on the Outersurface messes. 1- l th; fm 'erhalt-xr tulle I11 li in?" ri on of e p fac L 1 d a n o be JGHN @GATES fea fn: the gases ef-:imuling.longitudinally Witnesses ALFRED EL (LMENTS, H, A. AUBREY.

